Prince Luís of Orléans-Braganza (26 January 1878 – 26 March 1920), was a claimant to the former throne of the Empire of Brazil. He was born in Brazil, the second son of Prince Gaston, Count of Eu, and Isabel, Princess Imperial of Brazil.

He was exiled along with his family as the result of the 1889 coup d'état that resulted in the formation of the republic. In 1908, the year he married, his older brother Pedro renounced his claim to succeed his mother in her claim to the imperial throne, leaving Dom Luis as her heir. In this role he worked with monarchists in Brazil in several attempts to restore the monarchy. At the outbreak of World War I he enlisted as an officer with the British Armed Forces and saw action in Flanders where he contracted a virulent form of rheumatism that caused his death at the age of 42. His efforts on behalf of the Allies of World War I saw him decorated by Belgium, France and Great Britain.

Luís was born at Petrópolis on 26 January 1878, to Prince Gaston d'Orléans, Count of Eu, and Isabel, Princess Imperial of Brazil. His his maternal grandparents were Pedro II, Emperor of Brazil, and Princess Teresa Cristina of the Two Sicilies while his paternal grandparents were Prince Louis, Duke of Nemours, and Princess Victoria of Saxe-Coburg and Gotha. He was named after his paternal grandfather. His name in full was Luís Maria Filipe Pedro de Alcântara Gastão Miguel Rafael Gonzaga. As the second oldest son of the heiress to the imperial throne of Brazil, he was not expected to one day ascend to the throne.

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